Hair straightener



FIG. 1 is a perspective view of a hair straightener showing the presentdesign;

FIG. 2 is a first side view of the hair straightener of FIG. 1;

FIG. 3 is a second side view of the hair straightener of FIG. 1, thesecond view being a side view as seen from a side opposite the firstside view;

FIG. 4 is a top view of the hair straightener of FIG. 1; and,

FIG. 5 is a bottom view of the hair straightener of FIG. 1.

CLAIM The ornamental design for a hair straightener, as shown and described. 